Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-31678

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/04/2026
Last modified:
27/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> openvswitch: defer tunnel netdev_put to RCU release<br /> <br /> ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already<br /> detached the device. Dropping the netdev reference in destroy can race<br /> with concurrent readers that still observe vport-&gt;dev.<br /> <br /> Do not release vport-&gt;dev in ovs_netdev_tunnel_destroy(). Instead, let<br /> vport_netdev_free() drop the reference from the RCU callback, matching<br /> the non-tunnel destroy path and avoiding additional synchronization<br /> under RTNL.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools